Mancelia i



(No Model.)

M. I. GARRISON, Valve for Oscillating Engines.

No. 235.864. Patented Dec. 28,1880.

NJETERS, wuoraumoamimsn, WASHINGTON. D c.

UNITED STATES ATENT FFICE.

MANOELIA I. GARRISON, (DEOEASED,) OF NEW YORK, N. Y.;- MARY F. GAREISON, ADMIN ISTRATRIX.

VALVE FOR OSCILLATING ENGINES.

SPECIFICATION forming part of Letters Patent No. 235,864, dated December 28, 1880,

Application filed May 11, 1880. (No model.)

I 0 all whom it may concern:

Be it known-that I, MANcELIA I. GABRI- SON, of New York city, in the county of New York and State of New York, have invented certain new and useful Improvements in Valves for Oscillating Engines, of which the following is a specification.

The object of this'invention is the production of a cheap, durable, compact, and powerful engine; and in my invention I employ an oscillating enginecylinder, in combination with a slide-valve oscillating or swinging on a center and opening the ports of the cylinder to steamconnection, in conjunction with the motionof the crank and piston-rod.

The invention also'consists in the arrangement of trunnions extending from the slidevalve to outer bearings, and forming, with the slide-valve, a chest for the steam; also, of the arrangement of special stationary bearings for trunnions of the combined valve and chest, separate from those of the cylinder proper; also, of the arrangement of spring or equivalent pressure to keep the slide-valve to its seat while rotating or swinging on its bearings, and thus prevent leakage of valve while in operation; also, of a peculiar arrangement of the center of the oscillating valve and chest, in connection with the throw of the oscillating cylinder, causing the valve and cylinder faces to move in opposite directions; also, of the arrangement of valve-ports to connect direct to the trunnions without joint, and in other features of improvement, all as hereinafter set forth.

In the accompanying drawings, Figure 1 represents a sectional view of an engine containing my improvements. Fig. 2 represents a plan of combined valve and chest, forming bearings for oscillating the valve when at work. Fig. 3 is avertical longitudinal section of Fig. 2, and Fig. 4 is a vertical cross-section thereof.

Similar letters of reference indicate corresponding parts in all the figures.

A designates the engine-cylinder; B, the slide-valve; G, trunnions which form the chest to slide-valve; D, bearings for the trunnions; E, spring to keep the valve to seat; F, ad-

justable cross'head or cap for spring; Gr, setscrews for adjusting the pressure of the spring on the valve; H, slides for trumiion-bearings; P, engine-piston; R, engine-rod; W, crankwheel of engine; a a, cylinder ports; b b,

valve-ports; c, eXhaust-portin valve; d,steampassage through the trunnions; c, exhaustpassage through the trunnions.

To cheapen the first cost of an engine, the most important feature is the reduction of the number of pieces, so as to diminish theamount of fitting, planing, and general work. In my improvements I do away with the ordinary steam-chest and valve-motion, making the valve and chest in one piece, thereby requiring a very small amount of lathe-work and planing to form the valve-face. To protect the valve-faces in my apparatus, I may employ a cover or guard placed over these parts and secured by light bolts, merely to hold such cover or guard in place.

The enginecylinder is hung or suspended between two bearings formed on cylinder; or I may employ a plane face with adjustable anti-friction points or set-screws to provide for wear. the longitudinal center line of the cylinder. The combined valve and chest is suspended on bearings immediately above and in line with the cylinder-bearings, having the two The valve-face is planed parallel to 7 5 faces of the cylinder and valve between, to

give a reverse motion to each. As the cylin der-face oscillates toward the shaft the valveface swings away from it, taking the place of the ordinary motion caused by eccentric and rod, and causing the ports to be opened and 8 5 shut to admit or exhaust steam.

The steam for operating the engine isadmitted through the steam-trunnions at d, and, passing to port 1), allows steam to enter the engine-port a, to act upon the piston P, press- 0 ing it back, and by means of the rod R the crank-wheel-W, rotating on its center, carries the cylinder A downward and the valve-face outward, while a contrary movement is given to the oscillating valve B, which, as repre- 5 sented,keeps the steam-pressure to full stroke. As the crank passes the lower center, or one nearest to the engine, the motion of the cylin der is reversed, and also that of the valve, opening the steam to the opposite of the piston P, and in the same manner the exhaustport 0 opens to each side of the piston, and the exhaust-steam escapes through the trunnion e. In order to keep the valve properly to its seat the set-screw Gis turned down, forcing a pressure, by means of the cross-head I upon the spring E, and this, in turn, keeps the bearing D of the trunnions O in place, but at the same time permitting a slight rise and fall of the valve to accommodate the cylinder as it oscillates.

The combined chest and valve, as represented in Figs. 2, 3, and 4, is so cast or arranged as to allow the exhaust a free and clear passage out directly through the passage 0, While the steam enters through the passage 61, up and around the exhaust-passage, in both directions, to passages I) I).

This engine can run in either direction, and by reducing the friction at main bearings, placing steel points instead of the larger trunnions now in use, it can be run very economically, and the valve and ports can be arranged to cut off at any ordinary portion of the stroke.

It will readily be seen that by myinvention I can make an engine of only sufficient power to run a single sewing-machine or less, or I can make an engine of ten-horse power or more, and in either case the engine will be small, compact, durable, and thoroughly operative, and at the same time will lessen the cost and labor of manufacture as compared with other engines now in use.

What I claim as my invention, and desire to secure by Letters Patent, is

1. A combined oscillating slide-valve and steam-chest, made in one piece, and a spring to keep the slide-valve to its seat on its bearings, in combination with the cylinder of an oscillating engine, all constructed and arranged substantially as specified.

2. The combination of the oscillating slidevalve B with the trunnions O and bearings D, having the slides H, substantially as specified.

3. The combination of the oscillating slidevalve B with the spring E, adjustable crosshead F, and set-screws Gr, substantially as specified.

4. The combination of the engine-cylinder A, having the piston I, engine-rod R, and crank-wheel WV, with the oscillating slide-valve B, having the trunnions G, bearings D, slides H, and the spring E, cross-head F, and screw G, substantially as and for the uses and purposes above set forth.

5. The combination of the engine-cylinder A, having the cylinder-ports a a, with the valve B, having the valve-ports Z2 b, exhaustport 0, and trunnions (J, having the steam-passage d and exhaust-passage c, and with the operating mechanism, substantially as and for the uses and purposes herein-above specified.

MANOELIA I. GARRISON.

Witnesses:

Mrs. MARY F. GARRISON, ERNEST (J. WEBB, HARRY W. ADAMS. 

